Electric cooking apparatus.



L. D. SMITH.

ELECTRIC COOKING APPARATUS.

PPLIOATION :FILED FEB.12, 1912. RBNLWED 1111.8, 191s.

1,068,706. Patented July 29,1913.

m ummm TTOH/VEY UNITED sTATEs PATENT oEEroE.

LUTHER D. SMITH, OF DETROIT, MICHIGAN.

ELECTRIC COOKING APPARATUS.

Specification of Letters Patent.

Application filed February 12, 1912, Serial No. 677,262. Renewed January 8, 1913.

troit, county of Vayne, State of Michigan,

have invented a certain new and useful lmprovement in Electric Cooking Apparatus, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the saine, reference being had to the accompanying drawings, which form a part of this siiecitication.

My invention relates to electric cooking apparatus, and4 consists in the various arrangements and combinations hereinafter pointed out and specified in the claims.

In the drawings :'Figure l, is a sectional elevation of my improved cooker. I- ig. f2, is a sectional elevation of a modification thereof.

ln the drawings, similar letters refer to `similar parts.

In the drawings, A is the outside wall ot' the cooker; B, is the inside wall, the space C between the two being filled with a heat insulating material. D, is the cover which is also made of double walls d, d' and lilled with insulating material (Z2 in like manner to the side walls. It will be noted that the cover D its upon the top of the walls A. B C with an irregular fitting surface. as shown in Figs. 1 and 2, the cover in Fig-Qbeing lifted partially from the side walls in order to show the relative shape ot the parts as distinguished from each other.

The top of the casing A B C is formed of metal, shaped in an angularananner with a depending angle c, a vertical acute angle 0', a substantially vertical wall 02 and another depending angle c3 then again rising to an acute angle 04 to the edge of the inner B. There is thus formed two grooves in the top of the side walls, to wit, c and c3, the object of these grooves is to catch and retain the condensed steam that may form inside of the cooker and be condensed in passing outward through the crevices formed between the cover and the side wai' said condensed steam in the form of water entering in the grooves c and c3 so as to form "1. water seal.

wall` Patented July 29, 1913.

Serial No. 740,898.

the restricted portion of the internal partv of the cooker, after heating the same for a purpose` hereinafter described. Or the radiator E` may be formed up with a heating coil which may be connected up with a source 'ot electricity through insulated porcelain or blocks in the sidewalls, as shown at E in Fig. 2.

The radiator E is a modified form ot' the radiator E `but is held in a 'similar manner and may contain an electric coil M with electrical connections leading therefrom m, m', through insulated parts m2, m3 of the side wall.,as shown in Fig. 2. A similar constriction is formed in the inner walls at about one-third or" the height and is marked Zi', the wall is then restoredto its original diameter and continued to the bottom ot the heater.

In the form shown in Fig. l, a permanent radiator is located in the cooker, its outer walls closely iitting the inside wall ot the cooker. It will be noted that, this radiator is inserted about one-fourth of the way from the bottom to the top of the cooker and is not at the bottom of the cooker as the practice has heretofore been. The bottom of the cooker walls A. B is closed by an insulating bottom or cove (lr of heat insulating material which may be supported therein in any convenient manner from -the radiator F (which is held firmly in position). The manner of supporting it may be screws or any other means whereby said bottom may be detached. The lower cover G provides an accessible means of removing the plate f of the radiator for the purpose of repair or inserting a new electric coil; the plate f beingl removable by detaching screws f2, f2, or it may be held rigidly by any other means. The upper plate ot the radiator is designed to be rigidly attached to the inner walls and separates the hollow column of the heater into two sections, the removal ofthe cover l) disclosing' the contents ot the upper seciion while the removal ot the rover G discloses the electrical connections of the lower section. It bolt y/ is inserted through the cover G and supports the lower cover in position, as shown inlligs. l and 2. The heating coil ot the radiator is supported between two members of suitable insulating,` material held by screws f2. f2, which are removable h v displacing` the'cover G a'lter removing the screw g. Appropriate leads f3, f3, can be taken trom the heating` coil and carried to any convenient switch either on the stove or upon anyother section with such connections as are usually made in electrical apparatus.

The angular ledge 7X, is adapted to support any properly shaped dish that may be placed therein in such manner that the bottom held on the radiator l?. litany times such dishes are shallovver than the depth of the heater and therefore. l have employed the supplementary radiator which can be preliminarily heated in a convenient manner and at'tcr the dish is inserted, it can also be inserted above the dish and thus the heat. may be cqualized during the cooking operation. Furthermore, another dish can be placed on top of the supplementary radiator E and the cookinggoingon in both together simultaneously. lln Fig. 2, l have shown a modification of this structure in that the radiator l" is replaced by a diaphragm H which is held in position in the same manner as the upper plate of the radiator in Fig. l, but instead of carrying a heating' coil, it carries hollov7 terminals J, J, which are also connected by wires f3, f, to any source ot electrical supply and connects therewith through switches in the saine manner as hereinbeiore stated and as' usual in the art. These terminals J, J, are

-shaped at their upper ends to receive metal plugs K, K, which are formed upon the bottom ot a dish L, the bottom of the dish, however being; double and containing in the amnfolnfiate manner an electric heating coil M, the terminals of this coil are connected respectively to the terminals K, K, and therefore when. the dish L is in position in the heater, as shown in Fig, 2, electrical connection is made so that the heating coil is rendered operative on the turning ot the switch and the contents of the dish L are heated as well as the interior oi' thc'coolter. l have also hitherto shown in this ligure (Q) a supplementary radiator lil" containing heating` coil M as hereinbefore described. ln all other respects, the structure of the cooker remains the same as that shown in Fig. l and therefore need not be described.

Q lt will. be seen that essentially my heatdig" structure consists otl a perpendicular nacemos column surrounded by a non-heat conducting material and provided with a diaphragm rigidly suiiported intermediate between the two ends, and designed to carry electric heating coils ',t'oriningv two separate cylindrical chambers; the upper chamber designed 'to contain cookingfoods and provided with an insulated heat retaining' cover ot" peculiar shape. The lower chamber designed to contain cmovablc electrical resistance material with connectingattachments and also provided with a suitable removable cover to admit convenientl access thereto.

lleretofore the practice has been to place the electrically heated disk within the upper compartment where expansion and contraction caused by continued service rendered it liable to short circuits and short lived. The means which l have adopted provides against this as well for convenient and economical construction and arrangementot' parts used in combination with it to secure low consmnption of electric current for all kinds ot cooking` purposes.

What l claim is:-

l. lln an electric cooking stove, the combination oit' heat insulating side walls open at the top and bottom, a removable heat insulating` cover for the top, a removable heat insulating cover for the bottom and a permanent radiator supported between the two covers within the side invalls and comprising a removable lower portion and a Fixed upper portion between which lies a heating coil, substantially as described,

2. ln an electric heating stove, the (zombis nation ot sine walls open at the ends, of removable insulating` covers at both the top and bottom and a permanent heating,- clement supported near the bottom of the space inclosed by the side wallsl and means tor hanging the bottom removable cover to said permanent heat-ing element, the said permanent heating element dividing the chamber inclosed by the side walls into an upper .heating compartment anda lower compartment through which access to the heating` devices may be had, substantially. described.

3. ln an electric cooker, the combination of walls forming an inclosure, electrical connections leading' thereinto, a member dividing the inclosure into a cooking` compartment and a compartment tor the said electrical connections, the said electrical connections leading into the said member and closures for openings into each of said compartments, whereby access can be had to either compartment and its contents, substantially as described.

4t. ln an electric cooker, the combination of walls forming an inclosure, electrical connections leading; thereinto, a two-part closuresy for openings .in ech of said com. partments, substantially as described. l0 In testimony whereof, I sign this specication in the presence of two Witnesses.

' LUTHER D. SMITH.

member dividing the inclosu're into acooking compartment and a.. compartment/for containing the electrical connections and a hea-ting c'oi contained between the tvvo parts of the twoLpart member, 'a part of said Witnesses:

member on vthe sideof the electrical vcompertinent being removably connectible with LOTTA LEE BRAY, the other part to give access to the coil and R. A. PARKER.

Copieslof this patent may be obtained for've cents each, by addressing the Commissioner of Patents, v Washington, 13.0. 

